/* layout */
div#app {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 1280px;
    margin: 0 auto;
}

@media screen and (max-width: 1024px) {
    div#app {
        width: 100vw;
    }
}

header {
    flex: auto;
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100px;
}

nav {
    flex: auto;
    min-width: 100%;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    height: 40px;
    background-color: #003388;
}

main {
    flex: auto;
    min-width: 100%;
    min-height: calc(100vh - 140px);
}

footer {
    flex: auto;
    min-width: 100%;
    height: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #e3e3e3;
}

a {
    text-decoration: none;
}

ul{
    margin:0;
    padding:0;
}

img {
    width: 100%;
}

.w80 {
    width: 80%;
    margin: 10px auto;
}

.box {
    font-size: 14px;
}

a.button {
    display: inline-block;
    width: fit-content;
    height: 24px;
    line-height: 24px;
    text-align: center;
    margin: 0 4px;
    padding: 2px 6px;
    border: rgb(110, 110, 255) solid 1px;
    border-radius: 4px;
    background-color: rgb(70, 70, 255);
    color: white;
    font-weight: bold;
    letter-spacing: 2px;
}

a.button:hover {
    background-color: rgb(0, 0, 255);
}